|本期目录/Table of Contents|

[1]李地元,王涛.浅埋隧道爆破施工对地表建筑物安全的 试验和数值分析[J].中国安全生产科学技术,2015,11(11):112-117.[doi:10.11731/j.issn.1673-193x.2015.11.019]
 LI Di-yuan,WANG Tao.Experimental and numerical analysis on influence of blasting in shallow tunnel excavation on surface buildings[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2015,11(11):112-117.[doi:10.11731/j.issn.1673-193x.2015.11.019]
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浅埋隧道爆破施工对地表建筑物安 全的 试验和数值分析
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
11
期数:
2015年11期
页码:
112-117
栏目:
职业安全卫生管理与技术
出版日期:
2015-11-30

文章信息/Info

Title:
Experimental and numerical analysis on influence of blasting in shallow tunnel excavation on surface buildings
文章编号:
1673-193X(2015)-11-0112-06
作者:
李地元王涛
中南大学 资源与安全工程学院, 湖南 长沙 410083
Author(s):
LI Di-yuan WANG Tao
School of Resource and Safety Engineering, Central South University, Changsha Hunan 410083, China
关键词:
隧道爆破地表沉降质点振动速度FLAC3D
Keywords:
tunnel explosion surface subsidence particle vibration velocity FLAC3D
分类号:
X947
DOI:
10.11731/j.issn.1673-193x.2015.11.019
文献标志码:
A
摘要:
以沪昆高铁黄鹤堡隧道工程为研究对象,针对地表建筑物受大跨度浅埋隧道爆破开挖震动影响的情况,采用预裂爆破技术保护地表建筑 物的安全。结合爆破震动监测,并利用FLAC3D进行隧道爆破开挖数值模拟,对隧道地表沉降及建筑物所处位置的质点振动速度进行分析,通过 与现场实测数据进行对比发现:采用预裂爆破技术能够显著降低隧道地表质点最大振速,有效保护地表建筑物安全;隧道围岩等级越高,隧道 地表沉降值越小,地表建筑物越安全;数值模拟监测点质点振动速度与现场实测的质点振动速度变化规律基本一致,振动时间少于1s,水平方 向最大振速约为1.5 cm/s,垂直方向最大振速为1.6~1.7 cm/s,最大振速也比较接近。
Abstract:
Taking the Huanghepu tunnel engineering in the Shanghai-Kunming high-speed railway as research object, aiming at the situation that the surface buildings are usually influenced by the vibration of blasting excavation in large span shallow tunnel, the pre-splitting blasting technology was applied to ensure the safety of surface buildings. Combined with blasting vibration monitoring, and carrying out numerical simulation of blasting excavation in tunnel by FLAC3D, the surface subsidence of tunnel and the particle vibration velocity in the positions of buildings were analyzed. By comparing with the field measured data, it showed that the pre-splitting blasting technology can effectively reduce the maximum particle vibration velocity on the ground surface of tunnel and protect the safety of surface buildings. The higher the surrounding rock grade, the lower the surface subsidence, and the safer the surface buildings. The variation laws of particle vibration velocity by numerical simulation and field measurement were almost consistent, the vibration time was less than 1 second, and the maximum vibration velocity was also close.

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备注/Memo

备注/Memo:
教育部新世纪优秀人才计划项目(NCET-13-0588);国家青年973计划项目(2015CB060200)
更新日期/Last Update: 2015-12-15